“Giant superatoms” could finally solve quantum computing’s biggest problem

Researchers at Chalmers University of Technology in Sweden have introduced a new theoretical design for quantum systems based on what they call "giant superatoms." This concept offers a fresh way to protect, control, and share quantum information, potentially bringing scientists closer to building large-scale quantum computers.

Quantum computers are expected to transform fields like drug discovery and encryption by solving problems that are far beyond the reach of conventional machines. However, progress has been limited by a major challenge known as decoherence. This occurs when quantum bits, or qubits, lose their information due to interactions with their surroundings. Even small amounts of electromagnetic noise can disrupt the fragile quantum states needed for computation.

"Quantum systems are extraordinarily powerful but also extremely fragile. The key to making them useful is learning how to control their interaction with the surrounding environment," says Lei Du, postdoctoral researcher in applied quantum technology at Chalmers ...